Watchman&#39;s signal system



May 1945- E. A. SCHACHINGER 2,376,389

WATCHMANS SIGNAL SYSTEM Filed Oct. 21, 1941 a Sheets-Sheet 1 1N VEN TOR.

May 22, 1945 E. A. SCHACHINGER WATCHMANS SIGNAL SYS TEM , 1941 3 Sheets-Sheet 2 Filed 0615. 21

1 I I I l 4 1 w 1 5 I I I I I I a a r I 9 s I N V EN TOR. ac/aiggkr May 22, 1 4 E. A. SCHACHINGER WATCHMANS SIGNAL SYSTEM Filed Oct. 21, 1941 3 Sheets-Sheet 5 H5 125 24 ig INVENTOR.. EdaZag d 17. 'z/idrz'zgef /7 T T UANEVS Patented May 22, 1945 r UNITED STATES PATENT OFFICE waromvmn's SIGNAL SYSTEM Edward A. SchachingenAstoria N. Y. 7 Application October 21, 1941, SerialNo.415,863

'12 Claims. (01.177-360) This invention relates to a watchmans signal system and one of the objects of theinvention is to provide a watchmans signalling systemwhich.

not only requires actuation of a series of preliminary stations for each routine trip but also includes a novel arrangement designedto cause an alarm signal to be transmitted to a central or supervising station in th event an unauthorized person should attemptto operate the signalling system by making the rounds instead of the authorized watchman. l

The invention has for a further object to provide a watchmans signalling system that is more positive as compared with prior systems in itsassurance that the watchman shall be obliged to follow a predetermined tour of preliminary stations and which makes it practically impossible for the watchman or another to provide a dupli-. cate key or keys which can be used to efiect unauthorized actuations of the looks at any of such preliminary stations, H

Other objects of the invention are indicated in the following outline of the; features of the invention: One of the features of the invention is the provision of at least one dummy preliminary sta- .tion, the selection and location of which may only be known by two; people and whichshould it be actuated during a routine trip will causean alarm signal'to be sounded. v

Another feature of the invention is the'provision of a Watchmans signalling system having a transmitter station and one or more preliminary stations so constructed, interconnected and situated as to require the watchman to makepe riodic routine trips and therefore periodic, sur; veys of the property and if the watchman fails to doso or tries to cut short the trip or. if any unauthorized person meddles with the stations, such will result in an alarm which will call for anemergency check-up by those in charge. .Another feature of the invention is the provision of a watchmans signalling systemhaving a transmitter stationand a pluralitylof preliminary stations together with means under the conby the proper "key to automatically change the tumbler-combination of the lock so that for a subsequent operation a different predetermined key will be required. s

l Still another feature of the invention is the provision of a combination lock for a series of watchmans routine stations and for other usage, the changeable combinations of the tumblers thereof being controlled by a combination. changing key so that should the key fora particular tumbler combination become lost or stolen, the tumbler combination can be readily changed for a different key.

A further feature of the invention is to provide a type of lock station for a watchmanssignalling system having a key compartment from which a key isadapted to be released when the lock is actuated. A still further feature of the invention is to provide a transmitterstation for a watchmans signalling system of the type which is adapted to be actuated by a key to effect transmission ofa signal but which is provided with means to prevent repeated actuation of the lock thereof until the transmitter has had sufilcient time to trans: mit thesignal.

The above and additional objects and features of the invention are obtained by providing a' transmitter station and a plurality of preliminary stations each of which has alock, a switch and means operable upon actuation of the lock to change the switch from one to another position. The several stations are electrically interconnected so as to require the watchman to actuate the locks of the stations according to a predetermined plan before he can transmit a routine signal by actuation of. the transmitter station, and thatshould the preliminary stations not be actuated according to the plan an alarm signal will result instead.

Two of the preliminary stations are provided with dummy locks, that is to say, the locks are actuatable by any of the keys or by a master 1 key which maybe used with the system. Means are provided to selectively connect one of the two preliminary stations as a dummy preliminary trolof an authorized person to connect one of the,

station which is not intended according to the plan of operation to be actuated during" the watchmans routine trip.

Each of the preliminary station is provided with a key compartment adapted to receive the key whichhas been used to actuate the lock of that particular station, together with means to release another keyfrom the compartment for use. on thelock of the next succeeding station in any other employee "familiar with} the system leave employment. This is accomplished by providing a lock controlled switch by which one or: the other of the two stations is selected as either a regular preliminary station or as a dummy preliminary station. The two stations are'actue atable by any key in the series so that should a man's signalling system arranged in accordance v Fig. 5 is a horizontal sectional view taken substantially along line 55 of Fig. 3;

Fig. 6 is a fragmentary vertical sectional view taken substantially along line 66 of Fig. 5;

, Fig. 7- is. a fragmentary vertical sectional view of a preliminary station;

ate the selected dummy station which when actuated willcondition the system so that upon.

subsequent actuation of the transmitteran alarm signal will result. Alsmactuation ofthe dummy station will release a master key so that the intruder will not be suspicious that anything other than routine has happened. 3

Any alarm signal or a failure of aroutinesi'gnal to comein. at the time intervals planned will in effect result'in analarm at the central station so-that a prompt check-up may be made todetermine the trouble.- 1 i In one embodiment of the invention each of the stations with the exception of the two selective stations and the transmitter station is provided with an auomatic combination changing 1 i look whichis-so constructed that when the lock isactua'ted. a change in the tumbler combination of the lock is caused so that the lock can only be actuatable thereafter-by a different predetermined key. This typeof lock requires the watchmantosurvey the 'propertyalonga predetermined route because he is required to actuate the locks ina predetermined sequence.

- '-In another embodiment of the invention the stations are each provided with a'lock of the multiple-combination type wherein the tumbler combinationcan only be changed by a combination 'changing key. With the stations provided with this type of lock, only one key is used by the watchman. When-it'is desirable to change the locks for use with-a different key, the superintendent or other authorized person actuates each lock by the combination changing keyand issues Fig. 8 is' a view in vertical elevation taken substantially along line 8--8 of Fig. 7;

Fig, 9 is a fragmentary horizontal sectional View taken substantially along line 9-9 of Fig. 7; Fig. IOisavertica-l sectional view of a dummy station-selection switch: taken substantially along line 10 -I0 of'Fig. 11; Fig. 11 is avertical sectional view taken substantially along line III-4| of Fig. 10; Fig. 12: is a vertical sectional view of an auto-- matic key combination changing lock, which may be-used withicertain of' the preliminary stations, shown with a key inserted therein; Fig. 13 is a vertical sectional view of the lock shown in Fig. l2with thekey removed;

Fig. 14 isaplan viewof the key-way shaft of the lock shown in Figs. 12 and 13; Fig."l5 isa vertical sectional view taken substantially along line l5l5 of Fig. 12';

Fig. 16'isa perspective view of a combination changing sleeve of the lock shown in Figs. 12 to Fig. 1 7' is' a vertical sectional view of another 40 form of combination lock which may be-used with shown in the-lock. i

anew-key. -The locks thereafter will then be actuatable only bythe new key and, of course,

with the preliminarystations that a routine signal can only be transmitted after .proper actuation of apredetermined series of preliminary stations.

.For a better understanding, of the invention, reference is had to. the-following. detailed descrip tion to be read in connection. with the accompanying; drawings, in. which: I I

Fig. l is a diagrammatic illustration of a watch-'- Referring to Figs. 1 and 2 of the drawings, I have shown a series of stations adapted to be located at various places on the'property so that a watchman will be'required to make periodically acomplete survey of the property in order to actuate each or at least a predetermined series selectively selectedasa dummy station which is O-be avoided by the watchman during his routine -trips; I A

More particularly the preliminary station 31 o'r-'B2', whichever is selected by the position of the switch SS, has the samegappearance asythe other preliminary stations and is connected into the system sothat should it be unwittingly actu ated-by an intruder or other person be t on performing mischief" its'actuation' will condition the system so thatwhen the transmitter station I is actuated an alarm signal will be effected instead of the usual routine .signal. .Thus. during a watchmans trip to survey the property hewill, on leaving the transmitter station T, actuate first the preliminary station A1, then avoid the station B1 or B2, whichever has beenselected by the setting of the switch SS, and actuate the one not selected, then actuate stations A2 and A3 and finallythe transmitter station.T..

A signal receiver R is'placed in a central location or at anoifice and may be provided. with any suitable sounding and/or recording instruments. In the form diagrammatically illustrated in Figs. .1 and 2, the receiver R is provided with a routine signal sounding device RS and an alarm sounding device AS. The devices RS and AS give different audible signalsso that an. at-v tendant can readily distinguish alarm 1 signals from periodic routine signals. The system, .as will be hereinafter more particularly. brought out, can have besides a routine signal three types of alarm warnings. These are, depending on the operation of the system, an audible alarm signal, a double signal as when both routine and alarm signals are sounded simultaneously and the omission of the periodic routine signal which in effect is a warning that something has happened tothe watchman; C I a Referring moretparticularly to .Figs..3, 4 and 5 .of the drawings, the transmitter. station. T.

comprises a housing having mounted therein asuitable lock 22, the key-wayshaft 24 of which is adapted to be coupled with a shaft 25 mounted in frame members 26 and 21. Rotat ably mounted on the shaft.25 isa high and low lobecam'30 to which is secured on one sidethere-. of a four-toothed ratchet 32andon the other side thereof a stabilizing hub. portion. 34. Carried by the. shaft 25 isya pawl 35 which is biased by a spring 36 against the ratchet 32.

Thepawl 35 isadapted to engage the teeth on the ratchet and move the ratchet. and the cam 30 through an angle of 90 each time the shaft 25 is actuated by the key-way shaft 24; The cam 30 is adapted to engage amovable; contact 80 for successive engagement with contacts. 8! and 82 as the low and high portions of the cam are moved beneath the contact 80.

The stabilizing element 34 is provided with four flat faces engageable by a flat faced detent 38 contained in a bore 39 in a block 40 which is mounted on=a wall of the housing 20. The de-. tent 38 is biased againstthe element 34 by a spring 42 to insure proper positioning of the cam 30 for each. actuation of the lock. The block 40 also containsa bore 44 within which a camposition indicator 45 is adapted to move. The: indicator is biased. upwardly by a spring 46 against the. cam 30 and its positions are detectable through an opening 41.

.Each station is provided with an indicator 45 so that the superintendent or other authorized person can .determineby' inspection the setting of eachstation should routine operation be interrupted. Thus the system .can easily bereconditioned for resumption of routine operation without dismantling any of the stations. ;.Carried on the shaft 25 is also a winding arm operate theescapement mechanism and the associated ccde: transmitter. The. arm 48 is adapted to engage an arm 54 carried by the shaft 55 towind the springs Hand 52. The normal position of the arm 54 is determined by'an arm 6.! adapted to engage a stop 63.? The escapement mechanism is provided with; suitable reduction gearing 56 (Fig. 6) and a:code transmitter 60 is carried by a shaft 62 thereof.

:The code transmitter 60 is shown as comprising a, .diskhaving two setsof eleven teetheach, which whenthe disk is revolved 360 actuate a switch contact 64 relative to a contact 65 to send two groups of successive impulses over the circuit of. the system. .The number of impulsestrans-. mittedindicate the watchmans number or the identity ,of the transmitter sta'tionfrom which the signal is transmitted, it being understood that the signals can have any number of. ime pulses per groupand any number of groups;. also that the system can have more than one transmitter-station and that each such stationcan have a different signal. 5 1.. i To prevent anyone from actuating the transmitter T again before it has beengivensuflicient time to. transmit a signal, a safety hook 6B is providedto engage a lug 61 on anarm68. pivoted at69 on the frame 110. Thearm 68qis provided witha cam surface 14 biased bya spring '[Btoward a lug 15 on the arm 54. .As the arm 54 becomes unwound the lug 15 pivots the arm 68 to a position removing the lug 61' thereon out of thepath of'lthe hook 66. Thus, wheneverthe transmitter has completed transmission .of a sig-w nal, the lug 61 reaches. a position where it permits actuation of the lock-22 and the. arm 48 connectedthereto. i i .x.

When, for example, the, lock 22 is actuated by a key the shaft.25is revolved;counterclock-. wise aslviewed-in Fig. 3, causing the arm 48.110 engage and force the arm154 clockwise to wind the springs 51 and; 52. During the clockwise rotation of the. arm 54 the lug .15 moves along the cam surface 14 to permit the spring 16 to .urge the lug 61 against the outer surface of the safety hook 66. When the key-way shaft 24 and the shaft 25 are retracted by reverse movement .of

the .escapement mechanism drives the transmitter 60, the arm 54 revolvescounterclock- 48 by which the spring drive ofan escapement mechanism 50 can be wound to effect transmission of signals. The mechanism 56 isprovided on a shaft 55 with a pair of springs 5| .and 52 .(Fig. 5) which are relatively weak so that their resistance-to winding is not too great for an average size key. and yet strong enough. that when wound they will provideadequate power to wise and the lug 15 thereonengages the cam surface 14 to gradually pivot the arm 68 clockwise and thereby. move the lug 61 out of the,

path of the hook 66 so that by the time the arm 6| engages the stop 63 the lug 61 will have cleared thehook 66.9 5 1 The preliminary stations A1, B1; B2,.Az. and Amarei'dentical in construction and equipment, except that the stations B1 and B2 are] each provided with aswitch having five contacts instead of three I and a dummy lock, the purpose of whichwill be hereinafter described.

In Figs. 7, 8 and 9, the preliminary station A1 istshown asirepresentative of the preliminary stations and since many parts thereof are identical to parts used in the transmitter station,

such identical parts are identified by the same 30,.a ratchet 32,. pawl. 35. and a. stabilizer hub- 34. Associated with the switch contact cam 30 is a cam position indicator 45 and amovable contact 90 which is. adapted to engage contacts 9| and 92; depending on whether the low or high portion of the cam is in engagement with the contact 90. l The preliminary stations are each provided with a key compartment 94' defining a narrow passageway extending from a narrow key inlet slot 93 inithe'upper wall of the housing 85 downwardly to a. corresponding discharge slot 95 at the bottom thereof. Pivotally' mounted at 9! adj acent. the. key compartment is a: movable frame 96 biased by a spring 98 so that a. pair of lugs I an-d'I02 thereon are normally held in a position in which they extend transversely of the compartment. When a keyis dropped into the compartment, the headportion- I03 of the key is engaged by the lugs I00 and I02 to support the key within the compartment (Figs. 7 and 8). The frame 96 is provided with a cam surface I04 which is engageable by an arm I05 carried by the shaft 25. During actuation of the lock 22 the arm I05 is rotated" and removes the lugs I00 and I02 from key supporting position to a key releasing position indicated in Fig. 9. This permits the'keyto drop downwardly in the key compartment and engage a pair of spring elements I08 and I09 which releasably retain the key within easy access of the watchman.

Referring to Figs. 12 to 16.0f the drawings, an automatic combination lock 22 is disclosed which may be used in the transmitter station T and the preliminary stations A1, A2 and in so as to require the watchman to make his routine trips to the several stations in a predetermined sequence. The automatic lock comprises a barrel IIO within which is mounted the key-way shaft 24 and'a pin tumbler magazine H2. The magazine has a row of sockets II3 each containing a pin H5 and a spring I". Surrounding the magazine H2 is a combination changing sleeve II which is provided with a plurality of longitudinal rows N6 of apertures II8 (Fig. 16). Each aperture H8 iscircumferentially in line with a pin tumbler H5. The lock as illustrated has eight pin tumblers. There are, therefore, eight circumferential lines upon which apertures II8 may fall. In other words, there are eight aperture positions along each longitudinal lineof the sleeve II4, any combination of which maybe employed to form a single row 6. The number of rows H6 is limited only bythe cir cumference of the sleeve I14 and the size of the apertures II8.

For the set of six stations illustrated in Figs. 1 and 2', the lock may be provided with five rows II6"or in other words with five different key combinations. Sleeves with a lesser or greater number of rows I I6 can be provided and for systems having eleven stations, for example, the sleeve will be provided with ten rows II6. For still larger systems, duplication of sets, either of six or eleven stations or both can be provided, the sixth or eleventh station, as the case may be, being a transmitter station from which sig' nals are transmitted. I

' It is of course obvious that any desired number of pin tumblers may be employed, a set of eight pin tumblers being shown and describedfor purpose of illustration. The key-way shaft 24 is provided with a row of eight sockets I25 in which are disposed alike number of tumbler pins I20.

Assuming that the sleeve Us in such a positumbler. pins tion that the first, third, sixthand. eighth pins are. permitted to pass therethrough, as: indicated intFigs. 12 and 13, a suitable key I28. will lift the. first, third, sixth: and eighth pins I26-an amount. necessary to move the corresponding pins H5; until the lower ends thereof no longer extend beyond the: sleeve. In this position the key is permitted to turn and actuate: the shaft.

Upon actuation of the key,, the sleeve, H4 is moved. one position so: as tobring the next ad? jacent row of apertures into alignment with the H5. This is accomplished by a pair of gears I30 and I32, the gear I30 being rotataJbly carried on the key-way shaft 24 and the gear I32 being fixed to.the magazine H2. The sleeve H4 is provided at one end thereof with a circumferential row of notches I34 (Fig. 16 The magazine H2 is provided with a cam shaped detent I35 contained in a socket. I36 which is adapted to engage the notched portion of the sleeve II4 for movement with the magazine in one direction and. to slip under the notchedportion when the .movement. ofv the magazine is reversed. Mounted on the end of the-barrel H0 is ,a pawl I40 (Fig. 15) which is biased by a spring I42 so as to engage the notched portion of the sleeve H4. The gear I30 hasan opening I44 'to receive the inner end I45. of the key I28. When the key-way shaft 24 is actuated, thegear I;30 is engaged by the inner end portion I45 of .the key I28; during the. turn of the key-way shaft causing the gear I30 which revolves clockwise (Fig. 15) to drive the gear I32 counterclockwise: past the: pawl I40.v The movement of the.- gears I30 and I32 causes the sleeve I'M? due to the detent I35 to be'revolved with the magazine. During the reverse movement of the key-way shaft the pawl I40 is adapted to engage one ofthe notches I34 and holdthe sleeve II 4 in an advanced position while the detent I35 .is adapted to pass beneath the notched portion of thesleeve. To accurately center the row of 'recesses II3 of the magazine II2 with the selected row'of apertures of the sleeve IlI4, a. spring biased i detent I48 is provided in the magazine asindicated in broken lines in Fig. 13. Thus when a key has been used to actuate the lock and has been'withdra-wn therefrom, the sleeve II 4 will have been'moved from one combination position to another. The same key therefore cannot be used'to repeat the actuation until the lock has been successively actuated by all the other keys corresponding to. the series of combinations.

In order to minimize the chance of anyone picking the lock, the barrel I I0 is provided with a pawl I50 (Figs. 12, 13 and 15) which isfbiased byaspring I52 to a position extending into the key-way shaft. When a key is inserted, the inner end of the key-isadapted'to' dislodge the pawl I 50" (Fig. 12)' so thatit will not interfere with the operationof th lock.' Thus, anyone-attemptingto'pi'ckthe lock. must. not only force the tumbler pins upwardly on one side of the shaft but must also force the pawl I50 outwardly on the other side.

The key-way shaft. is provided at one end thereof witha pin I54 which is engageable with stop pins I55 and I 55 mounted on an end plate I51 of" the lock to limit the movement of the shaft. 1

The preliminary stations B1 and Bi are provided with lock's'similar to the form illustrated 'in' Fi'gs. 12 to 16 with the exception that the tumblers'are omitted so that any key for the series I of combinations-will actuate. them. .In

nextsuccessive station A1. The watchman, of

course, will in this case have a master 'key' to actuate station T when he wishes to transmit an alarm signal. I I

The preliminary stations B1 andBz are adapted to be selectively so connected as to transformthe station so selected; into a dummy station which is to be avoided by the watchman during his routine trips. This selectionis accomplished by operation of a selective switch SS shown inFigs. 2, l and 11. The switch SS comprises a housing I69 containing a. block of insulation I62 through which a shaft I63 extends and is coupled at I64 to the key-Way shaft I65 of a suitable lock 1 I10. "Pivotally mounted on the shaft IE3 is an insulated arm I12 having a conductor segment I14. The block I62 is provided with a plurality of engageable contacts-I15, I16, I11, I18 and I19, each constituting a movable pin I80 biased'by a spring I82 to a position engageable by the seg-- The segment is of such a size and I carriedon the shaft I63, the arm being adapted.

to engage, during operation of the lock, a'bolt I19 carried on the arm I12. The lock I may be of any desired type and for purposes of illustration may be of the type shown in Figs. 17 and I8 to be hereinafter described.

The switch SS and the several switches of the stations are interconnected by a circuit illustrated in Fig. 2. A suitable source of electricity either from batteries or from any other available source is provided for the system through wires 200 and 2!". The wire 20I is connected to the movable contact 64 operated by the signal transmitter 60. The contact 65 *engageable by contact 64 is connectedby a wire 202 to the movable contact 89 of the transmitter station the relative position of which 'with respect to contacts BI and 82 is controlledby the cam 30.

Each of the preliminary stations is provide'd with three contacts similar to the coritacts80, BI and 82 of the transmitter station T. These contacts are: For station A1, 90, 9| and 92;'for station B1, 269, 26I and262; for station B2, 210, 21! and 212; for station A2, 286, 28I and 282; and for station A3, 200, 29I and 292.

Wire 203 connects contact 8! to contacts 92 2M, 21!;282 and 292. Wire2I0 connects contact 82 tothe contacts 9I, 262,212, 28I and 29L Wire 204 connects the movable contacts 90, 280 and 290 of stations A1, A-i' and A3, and also the movable contacts'264 and 214 of the stations B1 and B2 to the alarm signalling device AS Movable contact 260 of station B1 is connected by a wire 205 to the contact; I19 of the switch SS. Likewise the movable contact 210 of station Bz' is connected by wire 206 to the contact I16 and contacts265 and 215 of the stations'Bi and Bz are connected by wires 201 1 and 208 to contactsllland-I18respectively.

.Thecontact I15 ofthe selective'switch SS which is always engaged by the segment .I14isconnected by wire 209 to the routine signalling device BS. The wire 200 from the'source of electricity is connected to both signalling devices RS and AS so that whenever the circuit is completed for either oneoor both of the, devices, either a routine or an alarm signal or a double (routine and alarm) signal will be sounded.

The circuit connections are such-that. when all-of the preliminary stations havebeen actuated accordingto a predetermined p1an,:that is, withallof the switch: actuatingicams moved to either vertical or horizontal positions, the selected dummy station'B1 or B2, as thecasemay be, being disregarded,-a' routine signal will be transmitted to the receiver station R upon operation of the transmitter. 60. This. circuit con dition can be readilytraced in Fig. .2 wherein the cams are all shown in vertical position. As

the transmitter 60 revolves through 360,to actuate the switch contacts 64 I and 65', electrical impulses willzbe conducted overa circuit includingithe wire 20I, contacts'64; 65, Wire 2Il2, co'ntacts 8I;-Wire203, contacts 210,'.21I, 'wire 206, contact I16; segment I14; contactlli'and wire. 209-to the routine signalling 5 device RS. The contacts I19, 92, "282 andl292being disen'fgaged for the condition illustratedin Fig. .2, no. other circuit is completed.

of the stations A1, 13am and A3 were not actuated to the positions indicated in Fig. .2, an alarm signal would .be efiected upon operation of. the transmitterasincei each suchs'tation, if not actuated according to plan'will provide a circuitlcon- .nection to wire ,204. and thence toa the alarm signalling? device ASA This will become "more apparent on consideration" of the table hereinbelow and the tracingof circuits fordifferent conditions. i 1 1 I A The circuits completed by various combinations of switch positions may easily be traced in Fig. 2 to determine whether a routine signal, an alarm signal, a. double signal (routine and alarm), or no signal at all*(silence). istransmitted upon operation of the transmitter 60. The following table gives the signal results fonvarious combinations withthe stations B1 selected by "the selector switch SS (Fig.2) as the. dummy station. a n

v TABL I C'an r positions of stations The circuit for the cam positions of condition No. 1 of the table hasbeenheretofore traced. The circuit for the: cam positions of condition No. 2 includes wire 202, contacts 80. 82,-wire 210, contacts 212 210, wire 20s, contact I16,

If any one or "all" segment. I14, contact 115 and wire 209 to the routine signalling device RS.

Conditions 3 and teach effect an alarm 'upon operationof the transmitter. Ihis iseasilyseen inqFig. 2 since three :clrcuits for each such condition are provided through the .contacts of stations A1, A2 and A to the wire 204 leading to the alarm signalling device AS.

Taking the =.cam positions of condition "No. '5 of the table, that is, with the cam of station A1 horizontal .and all others in the vertical, the :circuit includes wire .202, :contacts 80, 8|, wire 203, contacts 52,790.91101 wire 1204 to the alarm signalling deviceAS. A parallel circuit tothe one just. described'ralso exists .for condition No.

5. Leading'ifrom wire 203 the second circuit 'passes through contacts 211,210 and on through :the wire 206, switchtSS and the wire 209 to the routinesignalling device'RS. Thus a double signal, both routine and alarm, issounded. Such a double signal naturally is interpreted as an alarm and an 'emergency'check-up will be carried out. v

The cam positionsfor conditions Nos. 6, "9, 10 and 311 provide "parallel circuits similar :to those of condition No. 5 and double signals will be .efiected .upon operation of the transmitter.

Taking the ositions 'of'the cams ior condition .No. 7 the circuit'from wire'202 includes contacts -80, "8'l,'wire 203 to :the contacts 92, 261, 211, 282 and 292, each-of which ends in :a broken circuit.

'Thusno circuitwill have beenzcompleted'to either of the sounding-devices and nosignal will there- :fore result. The failure of an audible routine signal, however,.is regarded :as an alarm, because J .203, contacts 2?", 210 and wire 206 to contact 116 of the switch ES. From here on there are two parallel "circuits. One of the circuits is 'throug'hcontact I15 through the wire 209 to the routine'signalling device RS. The :othercircuit is through contact 111, wire 201, contacts 265, 264 and -wire 204 to the alarm signalling device AS. Thus a double signal will be sounded warning the attendant at the central office that an intruder is meddling with the system.

Similar signalling results, as set forth in the table, will take place when station B2 is selected as the dummy station. This is accomplished by shifting the switch SS to connect contacts I 15, llBand I19.

It will also be understood that the circuit con nections are such that when two .or more of the stations vary in cam position from the proper positioning of the cams 'o'f theother stations, a

the connections of the stations A1, A2 and A tine signal.

In :addition to theabove arrangement :and se- .=lection of dummy alarm :stations, the watchman will be required, when the systemyis provided with the automatic combination look as hereinbefore-stated, to actuate the stations in a .pre- :determined'sequence. In-Fig.1, for example, the sequence of-operation'is from station T to sta- -ti'on.A1, passing :up the dummy preliminary station B1 and going on to station B2, thence to A2, "then As, and finally back to the transmitter station T .whichwhen actuated will send in a rou- This sequence of operation is re-- aquired by the :automatic lock which as previously described changes the key combination of the lock each time the lock is actuated. Starting 'with "an initial key, the watchman will first actuate-the lock of station A1 and when the lock 'is'returned'to normal position and the key removed, the watchman willdrop the key in the.

slot '93 (Figs. 7 and '8) and take the key dropped by actuation of the lock to releasable position in thelowerend of the'key compartment 94. With this key the watchman will continue to station 1B2, having passed "the now dummy station ,B1.

The key compartments of stations B1 and B2,

however, are supplied with master keys "which may be used to actuateany one of the combination settings of the locks of the other stations. The master keys are so constructed as to merely actuate the .lock without advancing the lco-mbi nation sleeve H4. Therefore, the use of a master key in rotation with the other keys of the system does not interfere with the lock combination feature of the invention. The watchman,

however, goes through the same operation-at stawill "be necessary to actuate the locks of stations "B1 and .32 so as to exchange the 'keys thereof. The indicators 45 of the two stations will indicate whether ornot thetwo stations'are properly set for routine operation, and if one or the other is -not it may be actuated again. The watch- .man-maynow proceed with the routineoperation of the stations by including the station 551 as one -.of the series of stations to be actuated and avoiding the station B2. T

The lock :of the transmitter station may likewise "be an automatic lock or it may be a dummy .typeof lock actuatable by any of the keys in 'a system: as herein explained.-

Should anyone not acquainted with thesetting of the switch SS attempt to transmit routine signals he will not know which station. is the dummy station which must be avoided, even if he is aware of its existence. Thus, an intruder willmost likely actuate the dummy station B which Will release a key the same as at any of the other preliminary stations except that it will be a master key. The intruder without suspecting anything wrong will then take the master key-and go on to the next succeeding station and :so on to the transmitter station T. When, how- :ever, he actuates the transmitter station, instead of transmitting a routine signal 'he will effect :an alarm signal. 'The intruder will be unaware that he has caused an alarm instead of the routine'signal. p

Referring to Figs. 17 to 20 (also Figs. 15 and 16), an alternative'form o'f'lock 300 is illustrated which may be substituted'for the automatic combination lock 22. The lock 300 is also a combination type of lock and is in many details the same as the lock 22 of Figs. 12 to 16. The chief differences are in the construction of the key-way shaft 302 and the number of tumbler pins. The other parts which are resent in the automatic lock 22 have been for expediency identified by corresponding reference characters.

i The key-way shaft 302 is provided with a row of sockets 304 with cut-away parts 306 and 308 intersecting all of the sockets except one at M0. The cut-away portions 306 and 308 are on the same side of the row of sockets so thatthe combinationphanging key 3l2 can only be revolved in one direction, that is counterclockwise as viewed in Fig. 17. When the key 3I2 is inserted in the lock (Fig. 17) it is adapted to raise the pins 3 thereof so as to release the key-way shaft from the pins 3|5 and 3l6. Thefifth pin 3l4at 3l0 extends downwardly into the key-way shaft and is engaged by a notch 3l8' in the combination changing key 3 I 2 sothat only a key of this character can be used to change the combination of the look. It will be understood that the location of the part 310 and the notch 3l8 can be varied for different sets of locks. v

Fig. 19 illustrates the relative positioning of the tumbler pins 3M, 3l5 and 3l6 when no key is in the lock. The key-way shaft is effectively held against rotation by the pins 3l6, such as the three shown extending through the sleeve 1 I4. Fig. 20 shows the presence of one of the selectable keysin the lock with the tumbler pins sodisposed as to provide a break at each of the apertures in the combination row for which the sleeve I I4 is positioned. In Fig. 17, the second, third, sixth and seventh tumbler pins 3I5 are shownextending through the sleevefllll' into the cut-away areas 306' and 308. While these pins will prevent clockwise movement of the combination-changing key 3l2 (Fig. 17), they do not'prevent counterclockwise movement thereof because of the cut-away portions 306 and 308 function to raise the pins 315 inwardly of the sleeve H4 prior to movement of the sleeve from one tumbler combination position to another. i a

Each of the locks 300 is provided with a lug 325 (Figs. 1'7, 19 and 20) which is adapted to'engage the head of the key 326 to render the key movable in the direction (clockwise). opposite to the movement (counterclockwise) of the combination changing key 3|2 when the key is inserted in the lock. The key 3l2 is provided witha notch 328 so that the lug 325 cannot interfere with its movement. The clockwise and counterclockwise movements of the keys 3 I2 and 320 can, of course, be interchanged, if desired, by relocating the lug 325 and by having the cut-away portions 306 and 308 on the side of, the shaft opposite fromtheir location shown in Fig. 18.

To limit the movement of the shaft 302 in its clockwise or counterclockwise movements, as the case may be, I provide the shaft with a pin 330 which is adapted to engage the stationary stop lugs 332 and 334. The location of the stop 334 will depend upon the circumferential spacing between the rows H6 of apertures in the sleeve The inner end 320 of the key 3|2 is adapted to extend through theopening I44 in the: gearl30 to actuate the gear so as to drive the gear I32 and thereby the magazine I I2 and the sleeve I It, as hereinbefore described, whereby thesleeve H4 is tions when the system is providedwith this type i of lock, it being understood, of course, that all the locks will be set alike, and should the key become lost or stolen, the superintendent or other authorized person may, by using the combination changing key 3 I 2 actuate each of the locks and issue a new key to the watchman. Thus, by using this type of look there will beno need of replacing the in the details of the structure of the'several parts and also changes in the circuit connections and switches as well as the arrangement of the several parts may be made without departing from the invention, which is not to be regarded. as limited otherwise than as indicated bythe language of the appended claims.

i I claim: I

1. A watchmans signal system comprising a transmitter station and at least one preliminary station, the transmitter and preliminary stations each having a lock, aswitch having two contact positions andmeans operable upon actuation ofthe lock of each station tochange the switch thereof from one to the other of said positions, a signal device, and circuit means connecting said device to the switchof each station, said ciradvanced to a new key combination. position.

cuit means being controlled by the relative positioning of said switches to establish one or another of two circuit conditions at said signal device, one circuit condition to effect an alarm when the lock of the transmitter station is actuated and the other to effect a routine signal when the lock of the transmitter station is actuated.

2. A watchmans signalsystemcomprising a transmitter station and a plurality of preliminary stations, said transmitter and said preliminary stations each having a look, a switch having two contact positions and means operable upon actuation of the lock of each station to change the switch thereof from one to the other of said positions, a signal device, circuit means connecting said device to the switch of each station, said circuit means being controlled by the relative positioning of the station switches to provide any one of a plurality of circuit conditions, one circuit condition being formed by a predetermined positioning of said switches and other circuit conditions being formed should any of said switches fail to be in said predetermined positioning. said one circuit condition operating to effect a routine signal upon actuation of the lock of the transmitter station and said; other circuit conditions operating to effect an alarm when the lock of said transmitter station is actuated, andmeans for connecting one of said preliminary stations as a dummy station which, should it be actuated along with the other stations, will provide a circuit condition whichwill operate to effect an alarm upon actuation of the lock of the transmitter station regardless of the positioning of the switchesxof the other stations.

3. A watchmans signal system comprising a transmitter station and a plurality of preliminary stations, said transmitter and said preliminary stations each having a look, a switch having two contact positionsand means operable upon actuation of the lock of each station to changethe switch thereof from one tothe other of said positions, arsignal devicegcircuit means connectingisaiddevice .to the switch of each station, said circuit means being controlledby the relative positioning of the switche's ofthe transmitter stanon and at least one of the preliminary Stations to provide one or another of two circuit conditions, onei-c'ircuit con'dition to efiect an alarm when: thelock of the transmitterstation is acturated and the Jother'to effect a'routine signal'when the lock of the transmitter station is actuated, another preliminary station having a two-position switch-conn'ected therewith, and means connecting in circuit the switch of such-other preliminary station so as to establish it as a dummy station which should :it be actuated will establish a circuit conditionsuch that upon subsequent 'operati'onof the lock of the transmitter station an a larm will he eiiected regardless of the positionin'g of switches of the transmitter station and said first-mentioned preliminary stations.-

watchmans signal system comprising a transmitter station and at least two preliminary stations, said transmitter and preliminary stations each having a lock, a switch having a plu- 'ralityr of contact positions and meansoperable upon actuation of the'lock to change, the switch ia'om-one to, the other of said positions, a signal device; circuit means, connecting said device to the switches of said stations, at least a given one of the, preliminary stations having routine signalling contacts andseparate alarm contacts, and

means for selectively connecting in circuit either the routine -.contac't-s or the alarm contacts of said iven station.

5. A watchmans'signal system comprising a transmitter station and at least two preliminary stations, said transmitter and preliminary stations each'having a look, a switch having a plu- 'rality of contact "positions, and means operable upon-actuation of the lock to change the switch from one to the other of said positions, said two preliminary station's each having routine signal-' ling contacts and also alarm contacts, a signal device, and means to selectively connect in circuit with said signal device the routine contacts only of one of the stations andthe alarm contacts only of anotherof said stations.

I '6. A wat'chmans signal system comprising a transmitter station and a plurality of preliminary stationspsaid transmitter and preliminary stations each having a look, a switch having a pinrality of contact positions and means operable upon actuation of the lock to change the switch from one to the other of said positions, the locks of at least certain of the preliminary stations being each actuatable by a difierent key, a signal device, and circuit means so connecting said device in circuit with the switches that when each switch is in a predetermined contact position upon operation of the transmitter a routine signal is transmitted and should any of the switches fail to be in the predetermined contact position upon operation of the transmitter analarm is effected. 7. :91 watchmans signal system comprising a transmitter station, a plurality of preliminary stations. said transmitter and preliminary stati'ons each having a look, a switch and means operable upon actuation of the lock to change the switch from one to another contact position, the locksof at least certain of the stations each being "provided with a tumbler combination determining element, said certain stations each having a key compartment, means operable upon actuation of the lock to change the tumbler combination thereof for the next subsequent operation 'and to release a key from the key. compartment suitable 'for actuation of the "lock at the next succeeding station, and a circuit so associated with the switches that when each switch is in a predeterminedposition upon actuation of the transmitter a routine signal is transmitted and should any of :the switches fail to be in thepredetermined position uponI-iactuation of the transmitter an alarmiiseffected.

8.3A watchmans signal system comprising a transmitter station, at least one preliminary station, said transmitter and preliminary stations :each having 'alock, a switch and means operable upon actuation of the lock to change the switch from-one to another position, the locks ieach :hav- 'ing a tumbler combination determining element adapted to be set to permit actuation of the lock by a predetermined :key, a combination changing .key,=means 'actuatableiby said combination changingkeyto move the combination determining element of each lock fromone combination position :to another to permit actuation of the look by a 'dilierent predetermined key, a signal device, and circuit means connecting said device with the switches to provide a routine signal condition when each switch is in a predetermined position upon actuation of the'transmitter, and an alarm condition should either of the switches fail to be in the predetermined position upon actuation of thetrarismitter. i

'9." A, watchmans signal system "comprising a transmitter station'and at least one preliminary station, said transmitter and preliminary stations each having a look, a switch "having two contact positions and a cam movable from one position to another upon actuation of the lock to change the switch from one to the other of said contact positions, a signal device, and circuit meansiconnecting'sai'd device with the switch of each sta'- tion, said circuit means being controlled by the positions of the switches to establish a routine signalling condition-when the switches are in a corresponding position upon operation of the transmitter, and establishing an alarm signalling condition should the switches fail to be in corresponding position upon actuation of the transmitter; 10. A watchmans signal system' comprising a transmitter station and at least one preliminary station, said transmitter and preliminary stations each having a lock; "a switch having two contact positions and means operable upon operation of the lock to change the switch from one to the'other of said contact positions, said transmitter station having code transmitting contacts and driving means therefor, said driving means being movable by actuation of the lock of said transmitter station, circuit means controlled by the-contact positions of said switches to establish a routine signalling condition when the switches are in corresponding positions upon actuation of the transmitter lock, and means operable when said drivin'g means is moved by actuation of the transmitter lock 'to prevent repeated actuationoi the lock until a complete signal has been transmitted. 11. A signal transmitting station for a watchmans signalling system comprising a code transmitter having switch contacts, means to actuate the contacts and a having a'key-way shaft, means responsive to actuation of said shaft to move said power drive to transmitter driving position, and means operable when sa'i d drive is indriving position to prevent power drive therefor, a lock repeated actuation of said lock until a signal has been transmitted.

12. A signal transmitting station for a watchmans signalling system comprising a code transmitter having driving means which when moved 6 to a signal initiating position will operate the transmitter to transmit a given signal, a lock having a key-way shaft, means driven by movement of said shaft to move said driving means to signal initiating position, means movable to lock-latching position upon actuationof said lock, and

means controlled by said driving means to release said look after transmission of the signal.

EDWARD A. SCHACHINGER. 

